is this a song or joke? Please, more details
D is answer. (all of the above)
The part of the text that relates to this does not show, but anyway the answer would be:
They were not being successful in getting results from what they had planted, so it appeared like there was not way to avoid the population from going hungry/starving.
Famine = starvation, going hungry
Inevitable = unavoidable, impossible to prevent